My iPhone apps randomly closing by themselves and some can't be opened, anyone experiencing the same problem?

I am using iPhone 4s and 5.1.1, I dont run "jailbreaks" or ever jailbreaked my phone, its 2 days old. I did resolve some apps when all of downloaded apps can't be open like facebook when tapping miliseconds then closes, I resolved by reinstalling, but I face odd automatically closing itself the app angrybirds, while playing it just closes itself, any ideas? I havent reinstall it or anything yet, I have a clean account with precise detail as an apple id, cant think of any cause. does anyone have the same exact problem?